set
community {community-number[additive]} |
noneno set community {community-number[additive]} |
none

Syntax
Description:

community-number

Specifies that community number. Valid values are from 1 to
4294967200, no-export, or no-advertise.

additive

(Optional) Adds the community to the already existing
communities.

none

(Optional) Removes the community attribute from the prefixes
that pass the route map.

Command
Description:

To set the BGP communities attribute, use the
set community route map configuration command. To delete the
entry, use the no form of this command.

You must have a match clause (even if it
points to a "permit everything" list) if you want to set tags.

Use the route-map global configuration
command, and the match and set route-map
configuration commands, to define the conditions for redistributing
routes from one routing protocol into another. Each
route-map command has a list of match and set
commands associated with it. The match commands specify the
match criteria--the conditions under which redistribution is
allowed for the current route-map command. The set commands
specify the set actions--the particular redistribution
actions to perform if the criteria enforced by the match
commands are met. The no route-map command deletes the route
map.

The set route-map configuration
commands specify the redistribution set actions to be
performed when all the match criteria of a route map are
met. When all match criteria are met, all set actions are
performed.

Example:

In the following example, routes that pass the
autonomous system path access list 1 have the community set to 109.
Routes that pass the autonomous system path access list 2 have the
community set to no-export (these routes will not be advertised to
any external BGP [eBGP] peers).

In the following similar example, routes that
pass the autonomous system path access list 1 have the community
set to 109. Routes that pass the autonomous system path access list
2 have the community set to local-as (the router will not advertise
this route to peers outside the local autonomous system.